The population of a certain country in 1997 was 289 million people. In​ addition, the population of the country was growing at a rate of 0.8​% per year. Assuming that this growth rate​ continues, the model P(t)=289(1.008)^(t-1997) represents the population P​ (in millions of​ people) in year t. According to this​ model, when will the population of the country reach 397 million​ people?